Vacuum-evaporator for milk



(No Model.)

R, BLLIN.

i VACUUM `ESVAPlL'lR FOR MILK. No. 347,584'. y tema Aug. 17 1 86.-

NEPETERS. Phawmhagmphr, wnhmgwm D. c4

UNITED STATES PATENT OEEreEo ROBRT ELLIN, OF YONKERS, NEV YORK.

VACUUM-EVAPORATOR FOR MILK.

SPECIFICATION forming part df Letters Patent No. 347.584, dated August17, 1886.

Application tiled J' une 10, 1886. Serial No; 204,755.

(No model.)

To all whom it may concern.-

Beit known that I, ROBERT ELLIN, a citizen of the UnitedStates, residingat Yonkers, in the county of Westchester and State of New York, haveinvented new and useful Improvements in Vacuum-Evaporators for Milk, ofwhich the following is a specification.

My invention relates to improvements in evaporators, and especially tothose which are designed for treating milk; and it consists,essentially, in the combination,with a stationary container for theiluid to be evaporated, of a series of rotating frames, cutting-bladeson said fran1es,and aseries of counter cuttingblades and a scraper, saidcounter cuttingblades and the scraper revolving in the same directionwith the .cutting-blades at a lower rate of speed orin an oppositedirection, all of which is more fully pointed out in the followingspecication and claims, and illustrated in the accompanying drawings, inwhich- Figure l represents a transverse section in the plane x Fig. 2,of an evaporator constructed according to myinvention. 1 Fig. 2is alongitudinal section thereof in the plane y y, Fig. 1. y

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a stationary container that isintended to receive the fluid to be evaporated. Instead of making' thesame cylindrical, as is customary, I provide it with a dome, A, whichextends almost through its entire length', and is provided with afeed-opening, a, and with a number of glass windows,so that the interiorof the container may be inspected from without. The object of thisdome Ais to obtain a larger space for the accumulation of the distillation, soas to evaporate the liquid more rapidly. The distilled liquid is ledfrom the dome by an exit-pipe, a', to which a pump may be connected tocreate a vacuum. The container is surrounded by a hot-air chamber, B,which contains a series of steam pipes or radiators, b, and is providedwith an inlet and an outlet pipe for the air. The air iiowing throughthe chamber is held at a constant temperature, (below 140 Fahrenheit forniilk,) so that the container cannot become overheated. t

Instead of an air-chamber, a water-jacket or other well-known means canbe used to prevent an excessive temperature.

Vat the proper intervals to In the evaporation of milk, to reduce thesame to a dry powder, as well as in the evaporation in general, it isvery necessary to provide means to keep the mass constantly agitated,and also to free the same from the walls ofthe container, to preventcharring.

For treating milk I construct the apparatus as follows: Through thecenter ofthe container A extends a shaft, G, which is provided withbearings in the same and in astandard, C. A rotary motion in thedirection of arrow l is imparted to the shaft by means of abelt-andpulley connection with a countershaft, C, and on it are rigidlysecured a series of cuttin g-blades, D', having their keen edges facingin the direction of rotation of the frame. These series of blades extendthroughout the length of the container and revolve at a high rate ofspeed. Upon the shaft C is loosely fitted a sleeve, E, Fig. 2, whichextends into the container and carries a number of radiating arms, c ec?, and at proper intervals in the length of the shaft are looselyfitted additional sleeves, Elk, all said sleeves carrying correspondingarms e c e2. To the arms ee of each sleevev are attached long and narrowplates f, which extend throughout the length of the container, but donot come into contact with the walls of the same in their revolutions.These plates f serve as bases for the counter cutting-blades F, whichare arranged thereon pass between the blades D' on the frames D. On thethird arm, e2, of each sleeve E E* is secured a long narrow scraper, G,which extends throughout the length of the container, and is providedwith asharp cuttingedge,g, that is in close contact with the walls ofthe container. The sleeve E, and consequently the counter cutting-bladesand the scraper, are rotated, as shown in the drawings, in the samedirection as the shaft, but at a lower rate of speed, and, if desired,the sleeve maybe rotated in the opposite direction. In this example therotation of the sleeve is effected by means of a belt-and-pulleyconnection with the countershaft O2. The sleeve E* at the right-hand endof, the drum can also be connected by pulleys and a belt with thecounter-shaft C?. The scraper G removes all the material which settleson the walls of the drum, and as it accumulates on the counter-blades Fis broken up by the action ofthe euttingblades D'. By rotating the twosets of blades and the scrapcrs in an opposite direction or at differentrates of speed the contents of the container are kept constantlyagitated and are continually removed from the Walls as they accumulatethereon and broken up by the blades. My apparatus can be used forevaporating,r liquid masses of any description, just as elliciently asmilk. The residue after evaporation can be removed through suitableopenings in Ithe bottom of the container.

1What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the stationary container, of the series ofrotating frames D, the cutting-blades D' thereon, the series of countercutting-blades F, and the scraper G, said blades F and scraper beingconstructed to rotate independently of the cutting-blades D',substantially as shown and described.

2. The combination, with the stationary container, of the series ofrevolving cuttingblades D', the series of counter cutting-blames l",scraper and the scraper G, said blades F and G being,` constructed torevolve indc pendcntly of the cutting-blades D, as Shown and described.

The combination, with the stationary container A and the rotary shaftextending through the same, of the frame D, secured thereto, thecutting-blades D thereon, the sleeves E El, loosely fitted to the shaftand rotating independently of the shaft, the arms thereof, and thecounter cuttingblades F, and the scraper G, attached to said arms,substantiall y as shown and described.

1i. The combination, with the stationary container A, its dome A, andits jacket 13, of the series of rotary frames D, the cutting blades Dthereon, the series of counter cutting-blades F, and the scraper (i,said blades F and scraper G to revolve in an opposite direction to thecnttingblades, substantially as shown and described.

In testimony 7whereof I have hereunto set my hand and seal in thepresence of two subscribing;` witnesses.

noi'nna'r ELLIX. [n s] Witnesscsz W. liAUrif, E. F. Kas'rnsnnnnn.

